z1 This can be selected when using Surround Back speakers.
z2 For the best Auro-3D experience Surround Height speakers are recommended, however you may substitute Rear Height speakers from a Dolby Atmos speaker setup
in place of Surround Height speakers.
z3 Use 2 sets of Height speakers in the appropriate sound modes for Dolby Atmos, DTS:X or Auro-3D playback.
Use the Front Height and Rear Height speakers for Dolby Atmos playback.
Use the Front Height, Surround Height and Rear Height speakers for DTS:X playback.
Use the Front Height and Surround Height speakers for Auro-3D playback.